<%@ page import="com.sun.org.apache.xpath.internal.operations.String" %>
<%--
  Created by IntelliJ IDEA.
  User: once
  Date: 2022/4/12
  Time: 11:14
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/functions" prefix="fn" %>

<html>
<head>
    <title>Title</title>
</head>
<body>

原字符串：${param.str}</br>

新字符串：${fn:toUpperCase(param.str)}
</body>
</html>
